[479ac2d8] | 1 | /* irq.c |
---|
| 2 | * |
---|
| 3 | * This file contains the implementation of the function described in irq.h |
---|
| 4 | * |
---|
| 5 | * CopyRight (C) 2000 Canon Research France SA. |
---|
| 6 | * Emmanuel Raguet, mailto:raguet@crf.canon.fr |
---|
| 7 | * |
---|
| 8 | * The license and distribution terms for this file may be |
---|
| 9 | * found in found in the file LICENSE in this distribution or at |
---|
| 10 | * http://www.rtems.com/license/LICENSE. |
---|
| 11 | * |
---|
| 12 | * $Id$ |
---|
| 13 | */ |
---|
| 14 | |
---|
| 15 | |
---|
| 16 | #include <bsp.h> |
---|
| 17 | #include <irq.h> |
---|
| 18 | #include <rtems/score/thread.h> |
---|
| 19 | #include <rtems/score/apiext.h> |
---|
| 20 | #include <s3c2400.h> |
---|
| 21 | |
---|
| 22 | /* |
---|
| 23 | * This function check that the value given for the irq line |
---|
| 24 | * is valid. |
---|
| 25 | */ |
---|
| 26 | |
---|
| 27 | static int isValidInterrupt(int irq) |
---|
| 28 | { |
---|
| 29 | if ( (irq < 0) || (irq > BSP_MAX_INT)) { |
---|
| 30 | return 0; |
---|
| 31 | } |
---|
| 32 | |
---|
| 33 | return 1; |
---|
| 34 | } |
---|
| 35 | |
---|
| 36 | /* |
---|
| 37 | * ------------------- RTEMS Single Irq Handler Mngt Routines ---------------- |
---|
| 38 | */ |
---|
| 39 | |
---|
| 40 | int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq) |
---|
| 41 | { |
---|
| 42 | rtems_irq_hdl *HdlTable; |
---|
| 43 | rtems_interrupt_level level; |
---|
| 44 | |
---|
| 45 | if (!isValidInterrupt(irq->name)) { |
---|
| 46 | return 0; |
---|
| 47 | } |
---|
| 48 | |
---|
| 49 | /* |
---|
| 50 | * Check if default handler is actually connected. If not issue an error. |
---|
| 51 | */ |
---|
[d409705] | 52 | HdlTable = (rtems_irq_hdl *)VECTOR_TABLE; |
---|
[479ac2d8] | 53 | if (*(HdlTable + irq->name) != default_int_handler) { |
---|
| 54 | return 0; |
---|
| 55 | } |
---|
| 56 | |
---|
| 57 | _CPU_ISR_Disable(level); |
---|
| 58 | |
---|
| 59 | /* |
---|
| 60 | * store the new handler |
---|
| 61 | */ |
---|
| 62 | *(HdlTable + irq->name) = irq->hdl; |
---|
| 63 | |
---|
| 64 | /* |
---|
| 65 | * Enable interrupt on device |
---|
| 66 | */ |
---|
| 67 | if(irq->on) |
---|
| 68 | { |
---|
| 69 | irq->on(irq); |
---|
| 70 | } |
---|
| 71 | |
---|
| 72 | _CPU_ISR_Enable(level); |
---|
| 73 | |
---|
| 74 | return 1; |
---|
| 75 | } |
---|
| 76 | |
---|
| 77 | int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq) |
---|
| 78 | { |
---|
| 79 | rtems_irq_hdl *HdlTable; |
---|
| 80 | rtems_interrupt_level level; |
---|
| 81 | |
---|
| 82 | if (!isValidInterrupt(irq->name)) { |
---|
| 83 | return 0; |
---|
| 84 | } |
---|
| 85 | |
---|
| 86 | /* |
---|
| 87 | * Check if the handler is actually connected. If not issue an error. |
---|
| 88 | */ |
---|
[d409705] | 89 | HdlTable = (rtems_irq_hdl *)VECTOR_TABLE; |
---|
[479ac2d8] | 90 | if (*(HdlTable + irq->name) != irq->hdl) { |
---|
| 91 | return 0; |
---|
| 92 | } |
---|
| 93 | _CPU_ISR_Disable(level); |
---|
| 94 | |
---|
| 95 | /* |
---|
| 96 | * Disable interrupt on device |
---|
| 97 | */ |
---|
| 98 | if(irq->off) { |
---|
| 99 | irq->off(irq); |
---|
| 100 | } |
---|
| 101 | |
---|
| 102 | /* |
---|
| 103 | * restore the default irq value |
---|
| 104 | */ |
---|
| 105 | *(HdlTable + irq->name) = default_int_handler; |
---|
| 106 | |
---|
| 107 | _CPU_ISR_Enable(level); |
---|
| 108 | |
---|
| 109 | return 1; |
---|
| 110 | } |
---|